import { z } from "zod";
import {
  nonNegativeNumberFromForm,
  positiveNumberFromForm,
  nullableIntIdFromForm,
  isoDateString,
  DocumentSectionSchema,
} from "./common";

export const IssuedOrderItemSchema = z.object({
  description: z.string().max(500).nullish(),
  item_description: z.string().max(5000).nullish(),
  quantity: positiveNumberFromForm.optional(),
  unit: z.string().max(20).nullish(),
  unit_price: nonNegativeNumberFromForm.optional(),
  position: z.number().int().nonnegative().optional(),
});

const ISSUED_ORDER_STATUSES = [
  "draft",
  "sent",
  "confirmed",
  "completed",
  "cancelled",
] as const;

export const CreateIssuedOrderSchema = z.object({
  po_number: z.string().max(50).nullish(),
  supplier_id: nullableIntIdFromForm.nullish(),
  status: z.enum(ISSUED_ORDER_STATUSES).optional(),
  currency: z.string().max(10).optional(),
  exchange_rate: nonNegativeNumberFromForm.optional(),
  order_date: isoDateString.nullish(),
  delivery_date: isoDateString.nullish(),
  language: z.string().max(5).optional(),
  // Editable heading above the PDF items table; empty/null falls back to the
  // default "Objednáváme si u Vás:" (issued-orders-pdf t.billing).
  order_text: z.string().max(500).nullish(),
  internal_notes: z.string().nullish(),
  items: z.array(IssuedOrderItemSchema).optional(),
  // Rich-text CZ/EN sections rendered on their own PDF page (mirrors offers'
  // scope_sections — shared DocumentSectionSchema, DB-aligned limits).
  sections: z.array(DocumentSectionSchema).optional(),
  // Positional indices of company custom fields to print on this document's
  // PDF. Omitted/empty ⇒ none. Update schema derives via .partial().
  selected_custom_fields: z
    .array(z.number().int().nonnegative())
    .max(50)
    .optional(),
});

// Update = partial create MINUS the number: PO numbers are immutable
// (assigned by the sequence on finalize), so the field is stripped before it
// can ever reach the service (which never reads it on update anyway).
export const UpdateIssuedOrderSchema = CreateIssuedOrderSchema.partial().omit({
  po_number: true,
});